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Micellization and Interaction of Cationic Surfactants with Different Hydrophobic Group in Polar Organic Solvent
American Journal of Physical Chemistry
Volume 9, Issue 4, December 2020, Pages: 86-92
Received: Sep. 7, 2020; Accepted: Sep. 24, 2020; Published: Oct. 14, 2020
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Osundiya Medinat Olubunmi, Department of Chemistry, Lagos State University, Lagos, Nigeria
Olowu Rasaq Adewale, Department of Chemistry, Lagos State University, Lagos, Nigeria
Olaseni Segun Esan, Department of Chemical Sciences, Adekunle Ajasin University, Akungba-Akoko, Nigeria
Aboluwoye Christopher Olumuyiwa, Department of Chemical Sciences, Adekunle Ajasin University, Akungba-Akoko, Nigeria
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Surfactants are amphiphilic compounds that are widely used in various technological fields and biological systems. In many of these applications, mixtures of amphiphiles in organic solvents are employed for better performance The work aims at establishing the extent of ideality or otherwise in the mixed micelles of n-alkyl trimethylammonium bromide, (n = 14 and 16 for TTABr and CTABr respectively), in water (AQ) and water-monoethanolamine (AQ-MEA) at different mole fractions (0.1 to 0.6) and temperatures by Conductance measurement.: The values of the critical micelle concentration (Cmx) obtained in AQ, and AQ-MEA were lower than that obtained assuming an ideal mixing system. Substantial deviation from ideality was observed in the presence of AQ-MEA at all temperatures, suggestive of more favourable association of the surfactants in MEA solvent. The composition (χ1) of the mixed micelles obtained in the context of Rubingh’s model showed that the micelles of CTABr were dominant, and the values of the interaction parameters (βmx) were negative in AQ and AQ-MEA media with more synergistic interaction in the latter case at 0.1:0.9 mole fraction ratio at a particular temperature. The values of the activity coefficients (fTTABr, fCTABr) were below unity, and the evaluation of the energetics of micellization showed that the process was spontaneous and feasible.
Surfactant, Mixed-Micelles, Conductance Measurements
To cite this article
Osundiya Medinat Olubunmi, Olowu Rasaq Adewale, Olaseni Segun Esan, Aboluwoye Christopher Olumuyiwa, Micellization and Interaction of Cationic Surfactants with Different Hydrophobic Group in Polar Organic Solvent, American Journal of Physical Chemistry. Vol. 9, No. 4, 2020, pp. 86-92. doi: 10.11648/j.ajpc.20200904.11
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